The effect of neotectonic stress field on landslides in Ansai County of Shaanxi Province

Wu Chunlong; Jiang Yongqing

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The effect of neotectonic stress field on landslides in Ansai County of Shaanxi Province

- The effect of neotectonic stress field on landslides in Ansai County of Shaanxi Province
- Bulletin of Soiland Water Conservation Vol. 8, Issue 3, Pages: 40-44(1989)
- 作者机构：
  
  中国科学院水利部西北水土保持研究所
- 作者简介：
- 基金信息：
- DOI：
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- Published：1989
- 稿件说明：
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Wu Chunlong, Jiang Yongqing. The effect of neotectonic stress field on landslides in Ansai County of Shaanxi Province[J]. Bulletin of Soiland Water Conservation, 1989, 8(3): 40-44.
DOI：

Wu Chunlong, Jiang Yongqing. The effect of neotectonic stress field on landslides in Ansai County of Shaanxi Province[J]. Bulletin of Soiland Water Conservation, 1989, 8(3): 40-44. DOI：

摘要

遥感图象分析

揭示出在安塞县南部有塌地群发育。利用水系资料

求得塌地发育区新构造应力场的主压应力方向为N43°E。塌地移动方向存在两个优势方向

分别为NNE—SSW和EW

它与区域新构造应力场的剪切破裂面方向基本一致。重力平行与新构造应力场剪切破裂面的作用是沟谷边坡扩展过程的优势事件。

Abstract

Through wide field inventory

remote sensed image and topographicmap analysis

we found landslide groups and obtained the moving direction data of 162 landslides in southern Ansai county of Shaanxi Province.The moving directions of landslides have the preferential orientationsNNE-SSW and EW. In order to find a possible connection of landslideswith neotectonic stress field conditions

the 926 valley orientations havebeen measured on 1:100

000 scale topographic map. The preferential valleyorientations are N8°E and N77°E. Accordingly

they are considered asthe two shear directions of the local neotectonic stress field. Thus

oneof the principal stress directions has an orientation near N43°E

theother near S133°E

the first of these azimuths corresponding to the maxi-mum compression. Two of the shears can be compared with the movingdirections of landslides.

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